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HELP NEEDED: Something shifts after complete stop (UPDATE)

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by smack, Mar 7, 2003.

  1. smack

    smack 1/2 ton status

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    Obviously this is a hard one without seeing it but after a stop, something in the undercarriage noticeably shifts after I come to a complete stop and it only seems to happen after moving forward, not reversing. I jacked both front sides up and wiggled the wheels, everything seems tight. I even tried putting a jack under the front spring's rear shackle and that seemed tight.
    Anyone had this happen?? I'm thinking maybe a worn spring shackle or a bad body mount, but damn it's hard to find. Suggestions??
    tia,
    smack
     
  2. HarryH3

    HarryH3 1 ton status Author

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    Re: HELP NEEDED: Something shifts after complete stop

    Sounds like the slip joint in the rear driveshaft is binding. Have someone carefully watch under the rig as you come to a stop. The rear end lifts under braking, then will suddenly settle as the weight of the rear coming back down overcomes the binding in the slip joint.
     
  3. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    Re: HELP NEEDED: Something shifts after complete stop

    I'm with Harry 100%. I'd even go as far as to tell you to just yank the rear shaft, clean it out REAL good, deburr the inside of the slip on the DS's yoke, clean up the output shaft, grease the slip with some lithium grease, and slap in all back together. PROBLEM SOLVED! /forums/images/graemlins/cool.gif

    -Dan
     
  4. Sandman

    Sandman 3/4 ton status Author

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    Re: HELP NEEDED: Something shifts after complete stop

    You could also check the rear shocks. I had that and ended up with the top mounts loose.
     
  5. txbluethunder

    txbluethunder 1/2 ton status

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    Re: HELP NEEDED: Something shifts after complete stop

    i'll 3rd harry's suggestion. i had the same issue and would have never believed that the slip yoke could bind that much. it was almost like someone rearended me a 5mph after i came to a complete stop.
     
  6. smack

    smack 1/2 ton status

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    Re: HELP NEEDED: Something shifts after complete stop

    Interesting, I never even considered that a possibility. Neatly enough, only 3 months ago I had a new driveshaft made but when I installed it I did not put any lube on the slip joint 'cos I thought it was lubed by the fluid in the t-case. This is not so??
    smack
     
  7. smack

    smack 1/2 ton status

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    Re: HELP NEEDED: Something shifts after complete stop

    So you lubed it and the problem was solved?
     
  8. txbluethunder

    txbluethunder 1/2 ton status

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    Re: HELP NEEDED: Something shifts after complete stop

    yes. i pulled the rear shaft...cleaned the shaft and slip yoke and put a light layer of grease on the inside of the slip yoke. problem solved. /forums/images/graemlins/thumb.gif
     
  9. smack

    smack 1/2 ton status

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    Re: HELP NEEDED: Something shifts after complete stop

    Thanks all, I will "lube my shaft" tonight and let you know how it goes. /forums/images/graemlins/smile.gif
    smack
     
  10. Burbinator

    Burbinator 1/2 ton status

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    Re: HELP NEEDED: Something shifts after complete stop

    Interesting...thanks for the information /forums/images/graemlins/grin.gif. My Suburban has the exact same symptom. First time it happened, I thought someone hit my truck slightly. I got out of the truck at a light, just to check. It does not happen all of the time, usually when cold.

    I think I will lube mine this weekend, like Smack, while I am replacing rear shackles.

    /forums/images/graemlins/burb.gif
     
  11. gumneck

    gumneck Registered Member

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    Re: HELP NEEDED: Something shifts after complete stop

    Not sure if mine does the same thing or not but sometimes my 1991 BLZR stock all around makes a firm bump when slowing down from say 5 mph to 0. And then when starting off from 0 to 5. Also seems more likely when very cold. Could it be bad ujoints? Tks,,
    Tom
     
  12. rh88k5

    rh88k5 Registered Member

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    Re: HELP NEEDED: Something shifts after complete stop

    same thing happened to me, I heard GM makes a lube that resists the tranny fluid from breaking down the grease on the slip yoke!
     
  13. smack

    smack 1/2 ton status

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    Re: HELP NEEDED: Something shifts after complete stop

    Could you be so kind as to finding out which lube it is?
     
  14. JohnnyFresno

    JohnnyFresno 1/2 ton status

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    Re: HELP NEEDED: Something shifts after complete stop

    I lube my shaft on a daily basis.

    /forums/images/graemlins/blush.gif /forums/images/graemlins/blush.gif /forums/images/graemlins/blush.gif /forums/images/graemlins/blush.gif /forums/images/graemlins/blush.gif
     
  15. rh88k5

    rh88k5 Registered Member

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    Re: HELP NEEDED: Something shifts after complete stop

    I would if I knew, It cost me $85. at a 4x4 shop just to grease my shaft.I thought my ring and pinion was shot, just ask your local shop, if not contact me and I will find out for you. /forums/images/graemlins/thumb.gif
     
  16. 87sm465np208

    87sm465np208 1/2 ton status

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    Re: HELP NEEDED: Something shifts after complete stop

    your suposed to lube your shaft? thats weird, well when i do the lift, ill take the driveshaft out of the rear and put some grease in it, dam, didnt know that. /forums/images/graemlins/thumb.gif

    /forums/images/graemlins/usaflag.gif /forums/images/graemlins/truck.gif
     
  17. smack

    smack 1/2 ton status

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    Re: HELP NEEDED: Something shifts after complete stop

    WELP, I "lubed my shaft" this weekend, I must say it was quite enjoyable!
    Anyway, at first I didn't think it worked, but knock on wood, after a bit more driving the problem hasn't returned.
    Thanks all!!
    And might I add, you should all feel free to thoroughly lube your shafts!
    smack
     
  18. Goober

    Goober 1/2 ton status

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    Re: HELP NEEDED: Something shifts after complete stop

    [ QUOTE ]
    And might I add, you should all feel free to thoroughly lube your shafts!

    [/ QUOTE ]


    I'm quite sure that Beaver Oil is the preferred lubricant.


    /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif
     
  19. Panther212

    Panther212 Registered Member

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    Re: HELP NEEDED: Something shifts after complete stop

    THAT WOULD BE CORRECT /forums/images/graemlins/deal.gif
     
  20. CamaroZ85

    CamaroZ85 Registered Member

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    Re: HELP NEEDED: Something shifts after complete stop

    Could this also cause a "bang" when taking off from a light, or when coasting and then stepping on the accelerator? The guy I bought my truck from says that this happens but I havent experienced it (havent registered the truck yet) so I havent looked into it yet. Any ideas?
     

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